# Relationship history for MSHA mine 1401744

Current hierarchy: **Lance  Crosby; Jason  Crosby → Ark River Sand Co. LLC → Ark River Sand Co. LLC**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Ark River Sand Co. LLC → Ark River Sand Co. LLC; 2012-03-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jason  Crosby et al → Ark River Sand Co. LLC; 2012-03-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jason  Crosby et al → Ark River Sand Co. LLC; 2012-03-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lance  Crosby et al → Ark River Sand Co. LLC; 2012-03-19 to current/open; source msha-controller-operator-history